Bug 126356

Summary: 'linux rescue' fails to unmount the cd after booting
Product: [Fedora] Fedora Reporter: Ben Smith <fedora>
Component: anacondaAssignee: Jeremy Katz <katzj>
Status: CLOSED NOTABUG QA Contact: Mike McLean <mikem>
Severity: low Docs Contact:
Priority: medium    
Version: 1   
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Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2004-06-21 18:07:10 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Ben Smith 2004-06-20 00:56:41 UTC 
Description of problem:
On systems with <192MB RAM, specifically 128MB, after getting to a
shell prompt from booting 'linux rescue', the cdrom is still mounted
and cannot be unmounted.  The cdrom is unmounted fine on similar
systems with >=192MB RAM.

Version-Release number of selected component (if applicable):
anaconda-9.2-2.i386.rpm

How reproducible:
very

Steps to Reproduce:
1. Boot from install cd;  select 'linux rescue'
2. Go through the steps to find/mount your partition
3. At the prompt, issue 'df' and notice that /mnt/source is still mounted
4. Issue 'ls /tmp/cdrom' and notice that the device no longer exists
5. Issue 'umount /mnt/source' or 'umount /tmp/cdrom' and it fails. 
6. Try 'umount -f' 'umount -n' 'umount -d' 'umount -l', all fail.
 
Actual results:
Unable to unmount cdrom drive, although it seems no longer in use.

Expected results:
CD should be unmounted automatically.

Additional info:
I will test on FC2 as well as narrowing down the exact amount of
memory needed.
Comment 1 Ben Smith 2004-06-20 01:27:00 UTC 
This is as close as I was able to narrow it down:

It works if you have 130 Megs of RAM (linux rescue mem=130m).
It doesn't work if you have 128 Megs.
Comment 2 Jeremy Katz 2004-06-21 18:07:10 UTC 
This is due to the fact that the rescue image runs off of the CD.  If
you have "sufficient" RAM (and our marker for this is at > 128 megs),
then we copy the image into RAM and run from there instead.